Top-Emission Pixel Layout for Brightness Balance and Longer Display Life
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Solution Overview
Problem
Existing electro-optical devices face challenges in achieving high-definition color display and prolonged lifespan due to differences in light-emitting efficiency and current requirements across pixel regions, leading to brightness imbalances and color irregularities.
Innovation Solution
The electro-optical device features a top emission type configuration with adjustable pixel regions, where at least one pixel region extends beyond the unit area defined by wiring lines, allowing for flexible area adjustment and reduced non-emitting regions, enabling better light distribution and prolonged lifespan by optimizing current usage based on light-emitting element characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the light emitting area of the light emitting region emitting the color light component having the highest light-emitting efficiency is decreased, then the life span is extended and white balance is controlled, but the brightness of the overall panel is decreased
Solution Approach 1:
The patent allows pixel regions to extend beyond the boundaries of their unit regions into adjacent unit regions. This dimensional extension enables the light emitting region to compensate for reduced area within its own unit region by utilizing space from neighboring units, thereby maintaining overall brightness while achieving the desired area reduction for lifespan extension and white balance control.
Solution Approach 2:
The patent merges the light emitting region with adjacent unit regions by allowing it to extend beyond its original boundaries. This merging enables the light emitting region to maintain sufficient total area for brightness while the effective area within the specific unit region is reduced for lifespan management and white balance control.
2Area of moving object
If the area of pixel region is changed by changing the interval of signal lines, then the area adjustment is achieved, but the design modification is required according to arrangement of thin film transistors or wiring lines
Solution Approach 1:
The patent segments the display into unit regions that are independently defined by signal line intervals. Each pixel region can extend into adjacent unit regions without requiring changes to the signal line arrangement or thin film transistor layout, thereby simplifying the design process while enabling flexible area adjustment.
Solution Approach 2:
The patent creates a universal design where the same signal line arrangement and thin film transistor layout can serve multiple pixel region area requirements. By allowing pixel regions to extend into adjacent unit regions, the same wiring infrastructure supports different pixel areas without requiring design modifications.
3Ease of manufacture
If each pixel region emits light under the same condition, then the manufacturing is simplified, but the quantity of light of specific color is reduced and desired color cannot be displayed with high definition
Solution Approach 1:
The patent applies local quality by allowing different pixel regions to have different effective light emitting areas within their unit regions. This enables optimization of light output for each color component (R, G, B) to achieve accurate white balance and high definition color display, while the overall manufacturing process remains simplified through the standardized unit region structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the freedom to adjust pixel area, maintains brightness balance, and extends the lifespan of the display device by optimizing current distribution and light emission, preventing color irregularities and brightness degradation.
Implementation Method 1
light-emitting element having a top emission type in which light emitted from a light-emitting layer is radiated in a direction opposite to a substrate via a second electrode
Data Source
AI summary
To provide an electro-optical device which has the high degree of freedom with regard to changes in the area of a pixel region, and which can adjust brightness or a life span between light-emitting elements, easily control the white balance, and lengthen the life span of the overall display device. A top emission type of electro-optical device comprises first wiring lines, second wiring lines substantially orthogonal to the first wiring lines, and pixel regions selected by the first and second wiring lines. The electro-optical device has a plurality of pixel regions, and at least one of the pixel regions is provided so as to exceed a unit region surrounded by one of the first wiring lines and one of the second wiring lines, which select the at least one pixel region, and another of the first wiring lines and another of the second wiring lines respectively adjacent to one of the first wiring lines and one of the second wiring lines.